From a76378e83e324276ba8602206a7cc4060c7a8cc5 Mon Sep 17 00:00:00 2001
From: Luqman Aden <laden@csclub.uwaterloo.ca>
Date: Wed, 7 Nov 2012 21:37:41 -0500
Subject: [PATCH] Big oops, not all 2x2 matricies are upper/lower triangular.

---
 src/matrix.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/matrix.rs b/src/matrix.rs
index 57cc78d..3d9911c 100644
--- a/src/matrix.rs
+++ b/src/matrix.rs
@@ -157,7 +157,7 @@ pub impl<T:Copy Num NumCast> Mat2<T>: Matrix<T, Vec2<T>, Vec2<T>> {
     }
 
     pure fn det() -> T {
-       self[0][0] * self[1][1]
+       self[0][0]*self[1][1] - self[1][0]*self[0][1]
     }
 }